Girl Days is a Ranma 1/2 fanfiction by Robert "Kenko" Haynie.
The core plot of Girl Days is centred around a request by Ranma Saotome's mother, Nodoka, that he become more comfortable with his Jusenkyou Curse (he transforms into a girl when splashed with cold water) by spending two months as a girl. The story takes an episodic form, with several discrete stories, focused upon typical Ranma storylines of new challengers, magical attacks and day to day life in Nerima with the twist that Ranma is choosing to remain a girl.
Girl Days has generally been received as one of the best original flavor Ranma fanfics in existence. Despite minor continuity errors, it has consistently captured the comedic tone of the manga effectively, and has parodied some aspects of the manga and fan fiction as well. Despite its popularity, the story has not been updated since 2001, and was left without a conclusion, with Ranma still a full-time girl.
- This is one of the few Ranma fanfics in which Ranma does not even once change sex. The first chapter begins with Ranma having recently been splashed accidentally, and Nodoka then intercepts him and makes her request.